Well, that's a difficult one: Either PG is right and nobody needs search, then we'll find it doesn't matter, or I'm right and we do need search and then the searchyc guys will need to beef up their system.
But then at least we do know for sure we need that search.
As it stands, SearchYC doesn't get enough daily uniques to justify beefing up the system. Frankly, SearchYC was an experiment in how quickly I could learn a new technology (RoR) and build a system. I was completely expecting someone to come along a few months later to make SearchYC obsolete. It's been 2.5 years, and I don't think that's happened yet.
Well, no. SearchYC has no revenue. I maintain SearchYC and host it out of a box in my closet as a service to the community. It doesn't make any sense for me to commit to do "whatever it takes".
That being said, with a few hundred dollars worth of hardware and some software changes, SearchYC should be able to gracefully handle a couple orders of magnitude more traffic.
In all the time that I've been using it I think I've seen it down only twice, HN over the same period numerous times.